. "5 Italianmidget-submarines" . . . "Submarine warfare in the Black Sea campaigns (1943)" . . . . . . "6 German barges sunk, 1 damaged" . . . "Soviet Union" . . "Italy" . . . . "Germany" . . "1 German tug sunk" . . "1 Romanian barge sunk" . "29 submarines" . "Bulgaria" . "1 Bulgarian merchant sunk" . "Submarine campaigns in 1943" . "1 Romanian merchant sunk" . "Submarine warfare in the Black Sea campaigns (1943)" . "Anti-submarine forces" . "1 German tanker sunk" . . "Inconclusive" . "1943 campaign" . "Romania" . . . "4 German merchants sunk" . . . "* Limited Soviet success" . . . . . . "6 German U-boats" . .